Message boards : Graphics cards (GPUs) : strong screen slowdown when crunching.
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 K1atOdessaSend message Joined: 25 Feb 08 Posts: 249 Credit: 370,320,941 RAC: 0 Level  Scientific publications      | |
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An 8600GT is not particularly fast in terms of GPUGrid. Even my 8800GT has some slight lag occasionally. This effect is less noticeable the faster your primary card is. | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester  Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level  Scientific publications | |
though someone else will need to explain the 0.03 and what that exactly means, if anything. Just an estimate, nothing else. MrS ____________ Scanning for our furry friends since Jan 2002 | |
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An 8600GT is not particularly fast in terms of GPUGrid. Even my 8800GT has some slight lag occasionally. This effect is less noticeable the faster your primary card is. Well are you telling me softly that I can't do anything to make my screen movement more smooth ? :-/ What do you think about overclocking ? My card (I think) Is a "overclock card ready". In terms of the (0.03 CPUs 1 CUDA), this is in reference to the CUDA task not taking an entire CPU for use -- though someone else will need to explain the 0.03 and what that exactly means, if anything. 1 CUDA means that it use 100% of the GPU and 0.03 an estimation of the % cpu needed ? | |
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K1atOdessa Send message Joined: 25 Feb 08 Posts: 249 Credit: 370,320,941 RAC: 0 Level Scientific publications | |
Well are you telling me softly that I can't do anything to make my screen movement more smooth ? :-/ No, you really can't do much about it. You could suspend GPUGrid if it bothers you that much and only run when you aren't using the monitor. Be careful to watch the deadlines though, if you do this. My 8800GT isn't too bad for lag, but I don't know how much there is with an 8600GT and whether it can be lived with. What do you think about overclocking ? My card (I think) Is a "overclock card ready". I have two 8800GT's that I have manually overclocked slightly on both shader/core clocks and memory (not much, 10% or so). I also have a factory overclocked 9500GT (shader/core only) that I have bumped up the memory slightly (5% or so). You can try rivatuner to OC, but do so at your own risk. There are quite a few posts regarding this, so the best advice is to take is slow if you do. You could google your card to see what others have been able to accomplish in terms of OC with an 8600GT, but be aware that every card and environment in which it is run is different. Different results are to be expected on a case by case basis. | |
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Paul D. Buck Send message Joined: 9 Jun 08 Posts: 1050 Credit: 37,321,185 RAC: 0 Level  Scientific publications  | |
Well are you telling me softly that I can't do anything to make my screen movement more smooth ? :-/ Other things you can try ... If you have back ground image, set it to a single color. Turn off effects like zooming window opening ... depending on the OS there may be a number of other settings you could fiddle with to make it a little more tolerable. THere ARE discussions of these issues on the dev list and in other places that the devs get input from and this is one of the things in the hopper. But, there are other things that are in there first ... so don't expect a change anytime soon ... Snooze BOINC when you need better screen and so on ... when it lags, hit snooze again ... or, as suggested, suspend BOINC while working. Last suggestion, use the settings to stop BOINC during working hours (whatever they might be) ... | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
Well are you telling me softly that I can't do anything to make my screen movement more smooth ? :-/ You could do it, but even if you increase your speed by 30% (not likely) it's still going to be too sluggish with such a card to use the machine interactively. MrS ____________ Scanning for our furry friends since Jan 2002 | |
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Scott Brown Send message Joined: 21 Oct 08 Posts: 144 Credit: 2,973,555 RAC: 0 Level  Scientific publications  | |
With your card, it is not just the speed. While overclocking may help some, the 256mb is also a limiting factor that will exacerbate any screen responsiveness problems. | |
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I don't think the memory is a problem my 8600GT has 1G and mine is choppy. I'll just suspend GPUGRID when I need speed. | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
the 256mb is also a limiting factor that will exacerbate any screen responsiveness problems. Anything to back that up? With RivaTuner you can see that ~70MB of vid mem are used when GPU-Grid is running. So I don't think 256 MB is a limitation (yet). MrS ____________ Scanning for our furry friends since Jan 2002 | |
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Scott Brown Send message Joined: 21 Oct 08 Posts: 144 Credit: 2,973,555 RAC: 0 Level Scientific publications | |
I don't think the memory is a problem my 8600GT has 1G and mine is choppy. I'll just suspend GPUGRID when I need speed. For yours (and my 9500GT with 512mb for that matter), the choppiness is of course driven by the speed & shader count of the GPU. However, xmal's card has only 256mb and isn't just "choppy", even typing is too slow if GPUGRID is running. So, I was saying that the low memory in that case exacerbates the choppiness that might be tolerable on other higher memory 32 shader cards. For example, I typed this response on the machine with the 9500GT without any problems... | |
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I don't think the memory is a problem my 8600GT has 1G and mine is choppy. I'll just suspend GPUGRID when I need speed. Thanx a lot for all your answer. Memory, I think I can't add some, but I hop that overclock could help a little (I know just a little) to reduce tha lag. I don't ask a total smooth, but just better. I notice, today, that with another Workunit, it's not so bad. Could it be a bad workunit causing this or it's a lottery for me (workunit choice)? Ill teel you the advance of my situation with overclock. By the way, do you know the name of soft for linux to do this ? I've searched on nvidia site but found nothing :-( | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
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Scott, | |
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xmal,no, you can't add memory to your GPU. And there are threads about linux overclocking somewhere here. Ok, I'll search this, cool. Regarding the different WUs: the models which we're running differ in complexity (i.e. more or less atoms). You can take a look at the output of your tasks, there's a line "time per step". Less complex WUs need less time per step and run more steps, so the lag (the time it takes to calculate one step) is better. All right, I understand the differences between the WU now and the lag effect by the same way. Really tanks to you, Scott and other for the help! Really! TTYL8R | |
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Message boards : Graphics cards (GPUs) : strong screen slowdown when crunching.
